You are creating a dial-up connection for Internet access. The wizard cannot access the default Internet Service Providers （ISP） with either of the numbers provided. What is your alternate method for setting up the connection？（）
A. Configure the dial-up connection to negotiate with the server using Challenge-Handshake Authentication Protocol (CHAP).
B. You can choose the option to set up the Internet connection manually if you know the ISP's phone number and your account and password already.
C. You need to provide a known IP address before attempting to connect to the ISP server.
D. Your ISP is requiring Data Encryption. Configure the dial- up connection to use it.&e
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在金属膜盒中，充注低凝点液体的作用是（）。
A. 增大金属膜盒的轴向推力
B. 使金属膜片位移与压差信号成比例
C. 保证变送器工作稳定
D. 提高变送器工作的灵敏度
在下列几种常用的视频信号中，最基本的视频信号是（）
A. RGB
B. YUV
C. Y/C
D. 复合视频信号
GM cannot be used as an indicator of stability at all angles of inclination because（）.
A. M is not fixed at large angles
B. there is no M at large angles
C. G is not fixed at large angles
D. there is no G at large angle
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